鉄路机车车辆的一部分主要零件,目前都是用普通碳钢锻制出来的,并经过规定的正火处理,以改善零件的机械性能。以往的正火采用普通的缓慢加热方法,不仅加热时间长,而且正火后的质量时常不合乎理想的要求。1955年以来,我们学习了苏联的先进经验,推行正火的快速加热法,一方面 The main parts of Kushiro locomotives and rolling stock are currently forged from ordinary carbon steel and subjected to normalizing treatment to improve the mechanical properties of the parts. The normal use of normal slow heating method, not only heating a long time, and after normalizing the quality of the often do not meet the desired requirements. Since 1955, we have studied the advanced experience of the Soviet Union and implemented the rapid heating method of normalizing. On the one hand